Leiden Clinical Prediction Rule

Estimates 1-year risk of progression from undifferentiated arthritis to rheumatoid arthritis. Use as an adjunct to clinical assessment in early inflammatory arthritis clinics.

For clinicians only. This tool is for healthcare professionals and clinical education only. It does not diagnose, replace clinical judgement, or replace specialist assessment. Any decisions about a patient must be based on full clinical assessment, investigations where appropriate, and current clinical guidelines.

Interpretation

<6 low risk · 6–8 intermediate · >8 high risk of progression to RA at 1 year.

Sources

van der Helm-van Mil AH, et al. A prediction rule for disease outcome in patients with recent-onset undifferentiated arthritis. Arthritis Rheum. 2007.

For clinicians only. This tool is for healthcare professionals and clinical education only. It does not diagnose, replace clinical judgement, or replace specialist assessment. Any decisions about a patient must be based on full clinical assessment, investigations where appropriate, and current clinical guidelines.

2010 ACR/EULAR Classification Criteria for RA

Score joint involvement, serology, acute-phase reactants and duration to classify RA.

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Rheumatoid Arthritis · Disease activity score

DAS28-CRP

28-joint disease activity score using CRP, tender/swollen joint counts and patient global.

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Rheumatoid Arthritis · Disease activity score

DAS28-ESR

28-joint disease activity score using ESR, tender/swollen joint counts and patient global.

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Rheumatoid Arthritis · Disease activity score

CDAI

Clinical Disease Activity Index. A lab-free composite for RA disease activity.

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